Although some argue that legal curfews prevent young people from participating in illegal activities, this is not the case. Subjecting young people to legal curfews is not only ineffective but also counterproductive. Legal curfews are not an effective solution to preventing adolescent delinquency. An analysis of the FBI's National Incident-Based Reporting System (NIBRS) used FBI master files to collect information on all crimes committed over a five-year period. In the study, they analyzed the date of the crime, the time of day the crime was committed and the age of the perpetrator. They found that juvenile delinquency occurs more often Monday through Friday than on weekends. Juvenile delinquency occurs just after the average school day ends, around 3 p.m. On school days, serious violent crimes (which include: murder and sexual assault) and juvenile aggravated assault both peak at 3 p.m. Underage thefts peak later at night, at 9 p.m. On non-school days, these same crimes peak at 1 p.m. The curfew law here in Arizona states that minors under the age of sixteen cannot be o...